CVE-2026-89101
Everest Forms <= 3.6.2 - Insecure Direct Object Reference to Authenticated (Custom+) Arbitrary Entry/Form Disclosure and Deletion via MCP /tools/call JSON-RPC Endpoint
Description
The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.6.2 via the get_entry due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with custom-level access and above, to view, read, and permanently delete forms and entries belonging to any other user — including personally identifiable information submitted through public contact and lead forms — regardless of form ownership.
INFO
Published Date :
Nov. 6, 2026, 12:17 p.m.
Last Modified :
Nov. 6, 2026, 12:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-89101
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Everest Forms plugin to version 3.6.3 or later.
- Ensure proper authorization checks are implemented.
- Review and validate all user inputs.
- Implement strict access controls for form data.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-89101.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-89101 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-89101
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-89101 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-89101 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Nov. 06, 2026
Action Type Old Value New Value Added Description The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.6.2 via the get_entry due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with custom-level access and above, to view, read, and permanently delete forms and entries belonging to any other user — including personally identifiable information submitted through public contact and lead forms — regardless of form ownership. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-639 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89101.json">CVE-2026-89101</a> Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L22 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L30 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L34 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L46 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L563 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L62 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L669 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-handlers.php#L686 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-abilities-registry.php#L74 Added Reference https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.6.1/includes/abilities/class-evf-mcp-server.php#L52 Added Reference https://plugins.trac.wordpress.org/changeset/3704878/everest-forms/trunk/includes/abilities/class-evf-abilities-handlers.php Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/1fabe52a-b51e-4383-ac88-8f30e083c9bb?source=cve